<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
 <%
 	//session.setMaxInactiveInterval(50);//
 	//先判断一下
 	Object _name=session.getAttribute("USER_LOGIN");
 	if(_name==null){
 		//location=''
 		out.print("<script>alert('您还没有登录');location.replace('login.html');</script>");
 		return;
 	}
  %>
 
  